“半衰期”：虚拟学习社区研究的新方法

白继芳

（西北师范大学 教育技术与传播学院,甘肃兰州 730070）

    【摘要】半衰期理论是衡量科学文献老化程度的重要指标，当前对于该指标的研究已经扩展到网络信息计量学中。本文将此概念引入到虚拟学习社区对于首帖的研究中，提出首帖半衰期的概念，并选取首都师范大学虚拟学习社区网络教学平台的在线课程“网络教育应用”作为个案进行分析研究，对不同半衰期的首帖文本编码分析，并对于如何在学习论坛中发帖提出建议。

    【关键词】虚拟学习社区；半衰期；首帖半衰期；个案研究

    【中图分类号】G434

    【文献标识码】A

    【文章编号】1007-2179（2009）03-0080-05

    【作者简介】白继芳，在读硕士，西北师范大学教育技术与传播学院(bjf_718@126.com)。

Half-life:A New Way of Research into Virtual Learning Community

BAI Jifang

(College of Education Technology and Communication of North West Normal University, Lanzhou 730070,China)

Abstract: Half-life theory is an important theory that can be used to measure obsolescence of scientific literature.  The theory has been applied to web information metrology. In this paper, The concept of half-life is applied to the research of initial posts in a virtual learning community in a case study of the virtual online course titled "Applications of Web-based Learning" at Capital Normal University. In the study, the researchers analyze the coding method to analyze the half-life cycles of initial posts. Based on the analysis, the paper makes several recommendations on how to design posts for learner forums.

Key Words: virtual learning community; half-life; half-life of initial posts; case